You don't want to have to bola... a bola is nice since it's ranged...but the crappy part is you're disarmed when it happens. Your cycle of weapons can get messed up.
What i'm doing with my faction stealther is this...
Ninja/stealth/hiding/healing/anatomy/macing/tactics.
Tactics: Club for dismount + it has Shadow Strike (hit your opponent and it hides you) Back up weapon, Mace: Disarm + concussion blow. Dismount your opponent, disarm them, hit them with a DP dart, DS them + concussion, they run = mad damage. This way you don't have to deal with a bola disarming you.
You could use a lance or a pitchfork since you've got fencing. Or a UWBS club/bladed staff/axe.
Poison takes up skill you could use elsewhere. You can get the same effect with darts/stars, although it doesn't poison everytime like the Infectious Strike does. But lots of ppl carry potions these days anyways. Plus you can throw stars at a distance =)
Chivalry is nice... but then you need FC otherwise you'll get interrupted and die.
With this kind of template you want to be fast to kill, fast to hide. You don't want to be out in the open long (unless you've got good EP + DCI + you have healing/anat)